Sorption Studies of Ag, Cd and Pb Ions on Sulphydryl Hemp Fibers
نویسندگان
چکیده
Results of a systematic study on the Ag, Cd and Pb ions sorption characteristics and kinetic properties of an unconventional material produced by introducing sulphydryl functional groups into natural hemp fibers are presented and discussed. The equilibrium data are analyzed using the Langmuir and Freundlich isotherm models. The monolayer sorption capacity of modified hemp is 10.75, 14.05 and 23.00 mg g for silver, cadmium and lead ions, respectively, at 18 °C. The constant of sorption rates calculated by the Lagergren equation is 5.806 10 min for Ag, 1.632 10 min for Cd and 4.078 10 min for Pb ions. The systems under study offer some new attractive possibilities of selective sorption of various pollutants from aqueous effluents.
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